Department of Pediatric Dentistry, Dental Hospital: Hello! The survival rate of reimplantation is related to the length of time between tooth loss and reimplantation, the shorter the time the higher the survival rate. Therefore, the tooth should be put back into the original position immediately after the tooth is lost. If the tooth cannot be put back immediately, it can be placed under the injured person’s tongue or in the vestibule of the mouth, or in a cup with cold milk or saline, or wrapped in a plastic food bag to keep the periodontal membrane of the lost tooth moist and prolong its vitality, and then go to the hospital quickly for replantation. Never dry hide and visit a professional dental hospital or dentistry department as soon as possible. If the reimplantation is performed within half an hour, more than 90% of the reimplanted teeth can avoid root resorption. The time between deciduous and reimplantation is more than 2 hours, and the probability of failure of reimplantation occurs is high.